Abstract
Although dermoid cysts can develop anywhere in the body, they are rarely present on the floor of the oral cavity. Herein, we have reported the case of a 21-year-old woman who presented with a mandibular swelling. Computed tomography, magnetic resonance imaging, and ultrasonography revealed a tumor that was approximately 50mm in diameter and extended from the floor of the oral cavity to the submandibular region. The tumor was excised via an intraoral incision, and histopathological examination revealed that the tumor was a dermoid cyst. No recurrence was observed at the 8-month follow-up.
